Okay, this is what I'm using against a nid player who has "80 guants and 9 warriors as HQ"
Allright, I'm going to reply with this in mind.
1.) don't take anything more powerful than a heavy bolter. He has NO high strength OR low armor save units. Plus, warriors can't be "instant death"ed.
2.) Seriously, take heavy bolters. You will notice that the tyrannid will tend to spread out a little, especially if they know that you have blast weapons, but they will even if you don't. That being said, the missile launcher is a poor excuse for a bug hunting weapon, as the only advantage (longer range) is negated by their speed.
3.) drop the special weapons (except flamers). They will charge in, quickly. You will probably never get to fire 2x in a turn with a plasma gun, frag grenades aren't going to get too many in a blast marker (unless he's a dumbass, as they can glide through cover without problems). My only beef with the flamer is it's terrible range compared to a unit that can assault you from 18" away. There may yet be some use for them, though.
4.) drop the multilasers. Multilasers and heavy bolters do the same thing, in this case, but the heavy bolter will punch through warrior armor. Kind of handy when they have two wounds apiece, and can't be instantly killed.
5.) drop the russ. The battlecannon will only make your enemy spread out more, which isn't necessarily a good thing. Sure, it's going to be hard for your enemy to kill, but it's not going to be making a whole lot of kills itself, especially when they get into close combat range. Don't expect this unit to make its points back.
6.) with the 250+ pts. of units and upgrades that won't do anything against his list, I'd suggest you take another hellhound, another chimera with 2x HB's and a stubber, and use the rest to get more heavy bolters.
